list_peers

Lists active team members in LAN message box. Returns name and display name.

SERVERA2a Msg SOURCEgoudaren0528/a2a-msg

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/a2a-msg/list-peers.md

WHAT IT DOES

What list_peers does on A2a Msg

AI agents call list_peers to retrieve information from A2a Msg without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why list_peers is rated Low

Even though list_peers only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_peers safely

PolicyLayer is an MCP gateway: it sits between your AI agents and A2a Msg, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_peers, this is the rule to start with:

list_peers Allowed

list_peers is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_peers": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect A2a Msg, apply this rule, and every list_peers call is checked against it from then on.

FAQ

Questions about list_peers

What does the list_peers tool do? +

Lists active team members in LAN message box. Returns name and display name. It is categorised as a Read tool in the A2a Msg MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_peers? +

Register the A2a Msg MCP server in PolicyLayer and add a rule for list_peers: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches A2a Msg. Nothing to install.

What risk level is list_peers? +

list_peers is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_peers? +

Yes. Add a rate_limit block to the list_peers rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block list_peers completely? +

Set action: deny in the PolicyLayer policy for list_peers. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides list_peers? +

list_peers is provided by the A2a Msg MCP server (goudaren0528/a2a-msg). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on A2a Msg, and thousands of servers like it.

This server

All 10 A2a Msg tools →

Across the catalogue

list_symbols on ACE-MCP →aiva_list_affiliates on AIVA MCP Server → The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →